what is the modulus of elasticity for steel A36 at temp 20cS

what is the modulus of elasticity for steel A36 at temp -20c?

Solution

Temperature   Modulus of elasticity
     <70°F             29.9 x 10⁶ psi

I found few references to the effect of temperature on strength (ultimate or shear) in this temperature range.  Found some data on yield strength v. temperature starting at 70 deg F and going up to 800 deg F, and some data on cryogenic materials.  For example Inconel 718 specs show an ultimate strength of 226,000 at 70 deg F increasing to 291,000 at -423 deg F.  Based on this data only, you are not going to see a measurable difference between room temperature and -4 deg F. You will also see a slight effect on the Modulus of Elasticity with changing temperature.  Most important to consider is the Nil Ductility Transition Temperature or Transition Temperature of the material you are using.  Higher carbon steels get brittle at temperatures well above your low range.